Scrubber for gas



(No Model.)

G. ANDERSON.

SGRUBBER PUR GAS.

-N0. 306,892. Patented Oct. 21, v1884.

Mm/sw.-

@Oa/l ww. @ma www a o-TILJ 30 escapes through the pipe atinto the tirst of Usare STATES GEORGIE ANDERSON, OF \VESTMINSTER, ENG-LAND, ASSIGNOR OF VONE-HALF TO WILLIAM II. CIIAPPELL, OF CHICAGO, ILLINOIS.

SCRUBBER FOR GAS.

FQQEECATION forming part of Letters Patent No. 306,892, dated October 21, 1884,

Application tiled March 2G, 1383. (No model.) i Iatented in Eng-lard August 12, 1875, No. 2.843.

To all whom, it may concern.-

Be it known that l, GEORGE ANDERSON, a i subject ot' the Queen of Great Britain, resid- I ing in the city ot' VeStmnster, England, have,I 5 invented certain new and useful Improve ments in Scrubbers for Gas; and I do hereby' declare the following to be a full, clear, and exact description of the invention, sufficient to enable others skilled in the art to which it I@v pertains to make and use the same, reference being had to the accompanying drawing, forming part of this specification.

The object of my improvenient is to provide an apparatus which shall tlioroughlyt'ree illuminating-gas from tarry vapors, ammoniagas, and other like deleterious agents which impair its illuminating quality; and this ob-y ject l have accomplished by the scrubberhereinat'ter described, illustrated in the aecompa 2o nying drawing, and particularly defined in the claims at the end of the specification.

Upon a suitable base ot' masonry is placed what l designate the preliminary washer77 A. This washer consists of the water-pans a and a, which are provided with deflectionplates ai, and sustainy such relation to each other that when the gas enters through the delivery-pipe c3 it will be forced by the plates to pass through the water of each pan until it the series of cleaning-chambers of the scrubber. Each oi' these cleaning-chambers consists of a liquid-reservoir, B, above which arejournalcd the cleaning-drums G in such position that when the reservoirsare filled with water or other purifying` liquid the periphery of' the drums will dip somewhat below the surface of the same. These drums may be formed of any suitable material, preferably 4o wood, 'and their entire peripheries covered with the brush D of whalebone or other coarse fiber, securely held in place by a cement which will not be acted upon by the solvent properties of the gas. The bottom of each liquid-chamber, except the lowest, is curved, as shown, to conform to the brush, which fits closely beneath the same, so that the gas in its 'passage through each chamber must pass over cach drum and through the fibers of each 5o brush. Each cleaningehamber is provided ou one side with an induction-pipe and upon the opposite side with an eduction-pipe, the orifices of both these pipes b being upon a level with the top of the liquid reservoir of the chamber. The eductionApipe of one chamber extends 'to and constitutes the induetion pipe ofthe next chamber above, the top chamber being furnished with a suitable pipe for connecting` to the main.

To one end of the axles of each ofthe brush- 6o drums is attached a miter gear-wheel, e, which meshes in a companion wheel, e, on the driving-shaft eiland by this means revolutionr is imparted to the several drums of the series. At the top of the scrubber is placed a delivery sealpipe, Z. of ordinary construction, by means of which liquid entersl the upperlnost .reservoir of the series and passes in turn by overflow through connecting-pipes b to each of the reservoirs B, thence to the pans ct' a, 7o i Vthe pipe ai into the lowestcleansing-chamber,

is caused to travel above the top ot' the drum and through the wet bers of the brush until S5' it escapes through the eduetion-pipe of such chamber into the one above, and so on through the scrubber. As fresh liquid is constantly' added to the top chamber, it overtlows and passes out by the pipe b into the chamber be 9o low, and thus from chamber to chamber until it is drawn from the preliminary washer. The motion given to the drums is in a direction contrary to that in which the gas is passing, thus ycausing it to be acted upon by a fresh surface of wet fibers, which take up its iinpurities and deposit them in the water as the drums revolve. Vhen there is no mechanical power, the motion of the gas may be used to turn the drums; but in this case the brushes roo must revolve in the direction ot' the moving gas, and their act-ion willlnot be as efticient.

'.lhe brush-drums oli' each cleaning-chamber should be so constructed that the gas cannot` pass from the inlet-pipe on one side to the ont let-pipe on the opposite side without passing round the upper part of the brush. This is effected either by having the drum close at the circumterence and lower edge. dipping into the water, as shown, or bars may be attached across the drum-say six in the circumference, so that before one leaves the water at least one other will, have entered, and thus l'orined a partition across the vessel sealed in the liquid to prevent the gas passing under the drum.

In the drawing, live brushes are shown, placed vertically over each other; but they maybe placed hori'fontallyto each other, with only sullicient elevation, the one above the other, for the liquid to pass from the highest to the lowest brush, and the number of brushes may be increased or diminished and their diniensions altered according to the quantity ot' gas to be puritied; but I prel'er to have the brushes placed as shown in the drawing.v

The liber ot' which the brush is made should not be too line, whalebone, such as is used in stable brushes, being found suitable t'or the purpose.

lt is obvious that in many instances the brush portion of the scrubber may be advantageously employed Without the preliminary washer; but in most cases, especially where the gases have been but inlpert'ectly condensed,

.the use of the washer is preferable, as it serves to catch the tar in the bottom, and thus prevent a clogging et' the brushes.

'lt will be noticed that the external casing of the scrubber is made up of separable sections, each containing one brush, and connected in any suitable manner at the points y, thus permitting the number ot' brushes o1' a machine to be varied as desired. Itis preferable, also, that the plates on thc ends ot' the easing should be so constructed as to be removable for the examination or replacement of the brushes as they wear out; but it' the capacity ol' the scrubber be comparatively small-say not to exceed one hundred thousand cubic t'eet ot' gas per diem-the outer casing, instead of. being l'ormed of separate sections, may be cast in one piece, care being taken to provide openings in the casing sut'tif eiently large to admit the brushes into the several compartments, which said openings may be closed by suitable doors tightly litted to the casing. rlhe curved partition-plates 11"', which separate the several chambers, rest on the ledges b ot' the outer easing, and are carefully joined thereto to secure necessary tightness. l

1n usual practice the scrubber constructed as herein described is filled with water, and is arranged to receive the illuminating-gas :immediately after the saine leaves the condenser and just before its entry into the purifier. From eight to twelve gallons of fresh water should be supplied to the scrubber tor does not so readily absorb.

each ton ot' coal that is colced, the brushes or drums being ordinarily maintained at a speed of l'rom three to live revolutions per minne. Good results in freeing the gas from impurities are obtained as long as the water in the top chamber is not saturated to rxeeed one-had" ounce sulphide ol' ammonium to the gallon, though it is manifest that as descent is made, in the scrubber the percentage ofiml'mrities to the gallon increases imiterially, and this, too, without detrimental result, so that a solution is finally reached ot' strength sutlicient to allow for its economic treatment, and t'or recovery oi" the salts in solution as lye pro d nets ot' the gas manufacture. Where several, ot' the scrubbers are emploi ed in series, the tirst may be set apart for removal ol.' the ear bon bisulphide and the others l'or removal ot' the sulphureted hydrogen; or, again. aquaammonia or the like may be used in lieu ot' water to take up such impurities, as the latter It should be understood, moreover. that other than illuminatinggases may be successfully treated in a scrubber such as described. For example, t'ree au'nnoniagas may be discharged into and caused to circulate throughout the scrubber,

in which event the water contained in the several chambers will dissolve more or less of said gas and produce the ordinary aquafalnmonia. rlhe invention is not, therefore, con lined to any particular use ol" the apparatus7 but is intended to cover the construction ot' said scrubber, however the saine may be eniployed.

Having thus described myinvention,what l. claim as new, and desire to secure by Letters Patent, is*

1. The combination, in agais-sernbber, ol' a liquidreservoir, a rotary brush in said reservoir, and induction and eduetion pipes arranged upon opposite sides ot' the reservoir to cause the gas to pass through thebrush, substantially as described.

2. rlhe combination, in-a gasvscrnbber, ot'a liquid-reservoir, a rotary drum or brush in said reservoir, a curved plate above said drum or brush, and induction and eduction pipes for the gas, substantially as described.

tl. The combination, in a gasserubber, ol' a series` ot' liquidreservoirs, rotary drums or brushes in said reservoirs, and induction and eduction pipes opening into the sides ol" the reservoirs at points about on a line with thc axes ol" the drums and opposite eachother, substantially as described.

i. The combination, in a gas-scrubber, ot' a 'series ot' cleaning-brushes, liquid-i-eservoiis,

and a series ot' induction and eduction pipes connecting said reservoirs, substantially as described.

5. The combination ot' a series ot' cleaning brushes and liquid reservoirs located one above another, induction and eduction pipes located with respect to said drums7 substantially as described, and mechanism tor rotating` said brushes, as set forth.

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6. The combination, with theseries of c1eanl 9. An apparatus for scrubbing; gases. con

ing drums or brushes and theliquid-chambers, of preliminary washing-pans, substantially as described.

7. A gas-scrubber divided into superposed receptacles communicating through overflowpipes constituting channels for the passage ot'l vboth gas and liquid, in combination with the rotary cleaning-brushes and the geared shafts for operating the same, substantially as described.

8. An apparatus for scrubbing gas, consist- I ing of a series ot' cases or chambers with upper and lower induction and eduction pipes, a suitable device within each of said chambers arranged to rotate while partially imi'nersed in thc liquid and in the path ofthe ascending gas, and a series of overtlow-pipes arranged to open into each chamber opposite the rotating devices, substantially as shown, said overliow-pipes serving` to conduct the g 1s in an upward and the liquid in a downward directlon, substantially as described.

sisting of a series of cases or chambers connected by overtlow-channels, arranged substantially as shown, whereby the saine channels serve to conduct gas in` an upward and liquid in a downward direction. and a series ot' rotatinp;` sliatts arranged within said chambers, each shaft being furnished with suitable devices adapted to dip below the line ot' the overtiow-channels and raise liquid into the path of the ascending gas, and suitable gearing for imparting,` rotation to said shafts, substantially as described.

In testimony whereof witness my hand this 27th day of the month of September, A. D. 1882.

GEORGE ANDERSON.- 

